(under subclass 479) Subject matter having means located at or upon the post for actuating, locking, or controlling the movements of the semaphore.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3, 14, 20, 111, 118, 120, 125, 209, 220, 221, and various indented subclasses (except the "switch" subclasses thereunder) for various means for controlling semaphores.
257, 262 and 292, for various means for actuating semaphores.
